Refrigerator shelf



FIG. 1 is a perspective view of a refrigerator shelf showing our ornamental design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view of thereof;

FIG. 5 is a front view of thereof;

FIG. 6 is a rear view of thereof; and,

FIG. 7 is a bottom plan view of thereof. 

The ornamental design for a refrigerator shelf, as shown and described. 